FlashExam: new 'brain brute-force' mode

src/apps/flashexam.cpp

@@ -34,6 +34,7 @@ flashExam::flashExam(QWidget *parent)
     ui->saveCardsNotKnownToFileCheckBox->setDisabled(true);
     ui->randomizeCheckBox->click();
     ui->randomizeCheckBox->setDisabled(true);
+    ui->brainBruteForceCardsThresholdSpinBox->setDisabled(true);
 
     graphicsScene = new QGraphicsScene(this);
     setupCardsList();
@@ -69,6 +70,7 @@ void flashExam::on_startBtn_clicked()
         listName = ui->listWidget->currentItem()->text();
         QString cardsList = "/mnt/onboard/onboard/.flashexam/" + listName;
         QString answersList = "/mnt/onboard/onboard/.flashexam/" + listName + ".answers";
+        brainBruteForceCardsThreshold = ui->brainBruteForceCardsThresholdSpinBox->value();
         if(QFile::exists(answersList)) {
             log("Setting up cards list '" + listName + "'", className);
             initCardsList(cardsList, answersList);
@@ -87,6 +89,7 @@ void flashExam::initCardsList(QString cardsList, QString answersList) {
     randomize = ui->randomizeCheckBox->isChecked();
     nonRedundantRandomization = ui->nonRedundantRandomizationCheckBox->isChecked();
     saveCardsNotKnownToFile = ui->saveCardsNotKnownToFileCheckBox->isChecked();
+    brainBruteForceMode = ui->brainBruteForceCheckBox->isChecked();
     cardsAlreadyShown.clear();
     cardsNotKnown.clear();
     ui->nonRedundantRandomizationCheckBox->setChecked(false);
@@ -140,13 +143,32 @@ void flashExam::displayCard(bool existingCardNumber) {
         ui->cardNumberLabel->setText(QString::number(cardsAlreadyShownNumber / cardsTotalFloat * 100, 'f', 1) + "% done, " + QString::number(cardsNotKnownNumber / cardsTotalFloat * 100, 'f', 1) + "% forgotten");
     }
     else {
-        ui->cardNumberLabel->hide();
+        if(!brainBruteForceLock) {
+            ui->cardNumberLabel->hide();
+        }
     }
 
     if(!existingCardNumber) {
         if(randomize) {
+            if(brainBruteForceLock && cardsNotKnown.isEmpty()) {
+                brainBruteForceLock = false;
+                ui->cardNumberLabel->hide();
+                ui->cardNumberLabel->setText("");
+            }
+            if(brainBruteForceMode && cardsNotKnown.count() >= brainBruteForceCardsThreshold) {
+                brainBruteForceLock = true;
+                ui->cardNumberLabel->setText("Brain brute-force mode");
+                ui->cardNumberLabel->show();
+            }
             while(true) {
-                currentCardNumber = QRandomGenerator::global()->bounded(cardsTotal - 1);
+                if(brainBruteForceLock) {
+                    currentCardNumber = cardsNotKnown.at(cardsNotKnown.count() - 1);
+                    cardsNotKnown.removeLast();
+                    log("Brain brute-force mode: displaying card " + QString::number(currentCardNumber), className);
+                }
+                else {
+                    currentCardNumber = QRandomGenerator::global()->bounded(cardsTotal - 1);
+                }
                 if(nonRedundantRandomization) {
                     if(!cardsAlreadyShown.contains(currentCardNumber)) {
                         cardsAlreadyShown.append(currentCardNumber);
@@ -218,9 +240,11 @@ void flashExam::on_randomizeCheckBox_toggled(bool checked)
 {
     if(checked) {
         ui->nonRedundantRandomizationCheckBox->setDisabled(false);
+        ui->brainBruteForceCheckBox->setDisabled(false);
     }
     else {
         ui->nonRedundantRandomizationCheckBox->setDisabled(true);
+        ui->brainBruteForceCheckBox->setDisabled(true);
     }
 }
 
@@ -234,7 +258,9 @@ void flashExam::on_didNotKnowBtn_clicked()
 void flashExam::on_nonRedundantRandomizationCheckBox_toggled(bool checked)
 {
     if(checked) {
-        ui->saveCardsNotKnownToFileCheckBox->setDisabled(false);
+        if(!ui->brainBruteForceCheckBox->isChecked()) {
+            ui->saveCardsNotKnownToFileCheckBox->setDisabled(false);
+        }
     }
     else {
         ui->saveCardsNotKnownToFileCheckBox->setDisabled(true);
@@ -242,3 +268,21 @@ void flashExam::on_nonRedundantRandomizationCheckBox_toggled(bool checked)
     }
 }
 
+
+void flashExam::on_brainBruteForceCheckBox_toggled(bool checked)
+{
+    if(checked) {
+        if(ui->nonRedundantRandomizationCheckBox->isChecked()) {
+            ui->saveCardsNotKnownToFileCheckBox->setDisabled(true);
+            ui->saveCardsNotKnownToFileCheckBox->setChecked(false);
+        }
+        ui->brainBruteForceCardsThresholdSpinBox->setDisabled(false);
+    }
+    else {
+        if(ui->nonRedundantRandomizationCheckBox->isChecked()) {
+            ui->saveCardsNotKnownToFileCheckBox->setDisabled(false);
+        }
+        ui->brainBruteForceCardsThresholdSpinBox->setDisabled(true);
+    }
+}
+

src/apps/flashexam.h

@@ -25,6 +25,9 @@ private:
     bool randomize;
     bool nonRedundantRandomization;
     bool saveCardsNotKnownToFile;
+    bool brainBruteForceMode;
+    bool brainBruteForceLock = false;
+    int brainBruteForceCardsThreshold;
     QList<int> cardsAlreadyShown;
     QList<int> cardsNotKnown;
     bool answerShown = false;
@@ -47,6 +50,7 @@ private slots:
     void on_randomizeCheckBox_toggled(bool checked);
     void on_didNotKnowBtn_clicked();
     void on_nonRedundantRandomizationCheckBox_toggled(bool checked);
+    void on_brainBruteForceCheckBox_toggled(bool checked);
 };
 
 #endif // FLASHEXAM_H

src/apps/flashexam.ui

@@ -35,6 +35,31 @@
        </property>
        <item>
         <layout class="QGridLayout" name="gridLayout">
+         <item row="2" column="0">
+          <widget class="Line" name="line">
+           <property name="frameShadow">
+            <enum>QFrame::Shadow::Plain</enum>
+           </property>
+           <property name="lineWidth">
+            <number>2</number>
+           </property>
+           <property name="orientation">
+            <enum>Qt::Orientation::Horizontal</enum>
+           </property>
+          </widget>
+         </item>
+         <item row="5" column="0">
+          <widget class="QCheckBox" name="nonRedundantRandomizationCheckBox">
+           <property name="font">
+            <font>
+             <family>U001</family>
+            </font>
+           </property>
+           <property name="text">
+            <string>Non-redundant randomized mode</string>
+           </property>
+          </widget>
+         </item>
          <item row="1" column="0">
           <layout class="QGridLayout" name="gridLayout_2">
            <property name="bottomMargin">
@@ -102,7 +127,10 @@
            </item>
           </layout>
          </item>
-         <item row="7" column="0">
+         <item row="3" column="0">
+          <widget class="QListWidget" name="listWidget"/>
+         </item>
+         <item row="9" column="0">
           <widget class="Line" name="line_2">
            <property name="frameShadow">
             <enum>QFrame::Shadow::Plain</enum>
@@ -112,28 +140,27 @@
            </property>
           </widget>
          </item>
-         <item row="2" column="0">
-          <widget class="Line" name="line">
-           <property name="frameShadow">
-            <enum>QFrame::Shadow::Plain</enum>
-           </property>
-           <property name="lineWidth">
-            <number>2</number>
-           </property>
-           <property name="orientation">
-            <enum>Qt::Orientation::Horizontal</enum>
-           </property>
-          </widget>
-         </item>
-         <item row="5" column="0">
-          <widget class="QCheckBox" name="nonRedundantRandomizationCheckBox">
+         <item row="6" column="0">
+          <widget class="QCheckBox" name="saveCardsNotKnownToFileCheckBox">
            <property name="font">
             <font>
              <family>U001</family>
             </font>
            </property>
            <property name="text">
-            <string>Non-redundant randomized mode</string>
+            <string>Save forgotten cards list to file</string>
+           </property>
+          </widget>
+         </item>
+         <item row="10" column="0">
+          <widget class="QPushButton" name="startBtn">
+           <property name="font">
+            <font>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>Start</string>
            </property>
           </widget>
          </item>
@@ -150,31 +177,60 @@
           </widget>
          </item>
          <item row="8" column="0">
-          <widget class="QPushButton" name="startBtn">
-           <property name="font">
-            <font>
-             <bold>true</bold>
-            </font>
+          <layout class="QGridLayout" name="gridLayout_8">
+           <property name="bottomMargin">
+            <number>0</number>
            </property>
-           <property name="text">
-            <string>Start</string>
-           </property>
-          </widget>
-         </item>
-         <item row="3" column="0">
-          <widget class="QListWidget" name="listWidget"/>
-         </item>
-         <item row="6" column="0">
-          <widget class="QCheckBox" name="saveCardsNotKnownToFileCheckBox">
-           <property name="font">
-            <font>
-             <family>U001</family>
-            </font>
-           </property>
-           <property name="text">
-            <string>Save forgotten cards list to file</string>
-           </property>
-          </widget>
+           <item row="0" column="2">
+            <widget class="QSpinBox" name="brainBruteForceCardsThresholdSpinBox">
+             <property name="value">
+              <number>10</number>
+             </property>
+            </widget>
+           </item>
+           <item row="0" column="0">
+            <widget class="QCheckBox" name="brainBruteForceCheckBox">
+             <property name="sizePolicy">
+              <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
+               <horstretch>0</horstretch>
+               <verstretch>0</verstretch>
+              </sizepolicy>
+             </property>
+             <property name="font">
+              <font>
+               <family>U001</family>
+              </font>
+             </property>
+             <property name="text">
+              <string>Brain brute-force mode</string>
+             </property>
+            </widget>
+           </item>
+           <item row="0" column="1">
+            <widget class="QLabel" name="label_3">
+             <property name="font">
+              <font>
+               <family>U001</family>
+              </font>
+             </property>
+             <property name="text">
+              <string>Every</string>
+             </property>
+            </widget>
+           </item>
+           <item row="0" column="3">
+            <widget class="QLabel" name="label_4">
+             <property name="font">
+              <font>
+               <family>U001</family>
+              </font>
+             </property>
+             <property name="text">
+              <string>forgotten cards</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
          </item>
         </layout>
        </item>